Head Shape
Scaphocephaly causes a long, narrow head in infants. Learn the difference between synostotic and deformational (positional) scaphocephaly, when helmet therapy applies, and when surgery is needed.
Quick answer: Scaphocephaly is a long, narrow head shape in infants. It can be caused by early fusion of the sagittal suture (craniosynostosis) — which requires surgical evaluation — or by positional factors in premature babies (deformational scaphocephaly), where helmet therapy may help.
Scaphocephaly describes a head that is unusually long and narrow when viewed from above. The term comes from Greek: skaphe (boat) + kephale (head). It is also called dolichocephaly.
It is one of the most visible forms of abnormal head shape in infants. How it looks — and how it is treated — depends entirely on its cause.
These two forms look similar but have different causes and treatments:
Common signs when viewed from above or from the side:
Head shape measurements (cephalic index) and clinical examination determine whether the cause is synostosis or positional pressure.
A pediatrician or specialist performs a physical examination of the skull. If synostosis is suspected, imaging (X-ray or CT scan) may be ordered to confirm whether sutures are fused. Genetic tests are considered when a syndrome is suspected.
For premature babies, a careful assessment distinguishes deformational scaphocephaly from true synostosis — this distinction determines the treatment path.
Treatment depends on the type:
Helmet therapy for scaphocephaly applies only when there is no synostosis (sutures are open). Deformational scaphocephaly in premature infants is the most common scenario. If synostosis is confirmed, cranial helmet alone is not appropriate — surgical evaluation comes first.
When helmet therapy is indicated, the HKM Pro cranial helmet is fitted only at CranioWell Orthotics & Prosthetics Centers, using 3D scanning. See: cranial helmet therapy overview.
Scaphocephaly is a long, narrow head shape caused either by early fusion of the sagittal suture (craniosynostosis) or by positional pressure in premature infants. It is also called dolichocephaly.
A long head shape is the defining feature of scaphocephaly, but not every long head is scaphocephaly. Mild head elongation in newborns after vaginal birth is normal and resolves on its own within weeks.
Synostotic scaphocephaly (fused sagittal suture) usually requires surgical evaluation. Deformational scaphocephaly (no fusion) does not — repositioning and, when needed, helmet therapy are the treatment paths.
Helmet therapy can help reshape a long, narrow head when the cause is positional (no suture fusion). When synostosis is present, surgery comes first; a helmet may be used after endoscopic surgery to support reshaping. A physician assessment is required before any helmet is fitted.
The cephalic index (head width ÷ head length × 100) is typically below 76 in scaphocephaly (dolichocephalic range). Normal range for infants is roughly 76–83. 3D scanning provides more precise measurements than tape measure. See: 3D head scanning vs tape measure.
